/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.it.framework;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.stream.Stream;

public class IoTDBTestReporter {

    public static void main(String[] args) throws IOException {
        List<IoTDBTestStat> stats = new ArrayList<>();
        Path outputDirPath =
                Paths.get(
                        System.getProperty("user.dir"), "integration-test", IoTDBTestListener.statOutputDir);
        File outputDir = outputDirPath.toFile();
        if (!outputDir.exists() || !outputDir.isDirectory()) {
            IoTDBTestLogger.logger.error(
                    "the output dir {} is not a valid directory, the reporter will be aborted",
                    outputDirPath);
            return;
        }
        try (Stream<Path> s = Files.walk(outputDirPath)) {
            s.forEach(
                    source -> {
                        if (source.toString().endsWith(IoTDBTestListener.statExt)) {
                            try {
                                List<String> lines = Files.readAllLines(source);
                                for (String l : lines) {
                                    String[] parts = l.split("\t");
                                    if (parts.length == 2) {
                                        IoTDBTestStat stat = new IoTDBTestStat(parts[1], Double.parseDouble(parts[0]));
                                        stats.add(stat);
                                    }
                                }
                            } catch (IOException e) {
                                IoTDBTestLogger.logger.error("read stats file failed", e);
                            }
                        }
                    });
        }
        Collections.sort(stats);
        StringBuilder sb = new StringBuilder();
        sb.append("\n");
        sb.append("==== Top 30 slowest cases ====\n");
        for (int i = 0; i < Math.min(30, stats.size()); i++) {
            sb.append(stats.get(i)).append("\n");
        }
        IoTDBTestLogger.logger.info(sb.toString());
    }
}
